Finding the Fourth Proportional to 108,639.36, 162,978.48 and 46,314.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,639.36 : 162,978.48 = 46,314.72 : x
2. Step 2: Convert to fraction form
   108,639.36/162,978.48 = 46,314.72/x
3. Step 3: Cross multiply
   108,639.36x = 162,978.48 × 46,314.72
4. Step 4: Simplify right side
   108,639.36x = 7,548,302,667.23
5. Step 5: Solve for x
   x = 7,548,302,667.23/108,639.36
6. Step 6: Final answer
   x = 69,480.37